Michelle, 27, who is engaged to Britain’s 2013 Tour winner, got embroiled in a Twitter spat ­after a fellow passenger on a flight to Dubai watched a documentary about disgraced US cycling legend Lance Armstrong, 42.

The Welsh-born beauty told her Twitter followers: “Thanks to the passenger next to me for watching The Armstrong Lie on the flight over here.

"I’m in a proper grumpy mood.

“I wonder if @lancearmstrong is sorry for the anger & resentment he’s left behind which is now aimed at the true heroes of the sport.”

Her remarks triggered slurs by twisted trolls that 28-year-old Chris’s success was down to performance-enhancing drugs.

But photographer Michelle replied: “Go f*** yourself.

“I don’t know what the hell is wrong with people, thinking it’s okay to tear into innocent people”

Michelle Cound on Twitter

“I don’t know what the hell is wrong with people, thinking it’s okay to tear into innocent people.

"You are the scum of the earth.

"Chris is a true (and clean) hero no matter what the twitter jokers say.

"Sick, sick people.”

Michelle later added: “Apologies for some of the bad language.

"Everyone has their limits and I’ve hit mine.”

It is not the first time she has defended her fiancé.

She had a war with Team Sky cycling chiefs after she felt Chris was being shackled to ensure Sir Bradley Wiggins, 33, won the 2012 Tour.